Lev's disease: Difference between revisions
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[[Stokes-Adams attack]]s can be precipitated by this condition. These involve a temporary loss of consciousness due to [[ventricular fibrillation]] or [[asystole]].<ref name="pmid30723001">{{cite journal| author=Carius BM, Long B, Schauer S| title=Lev's Syndrome: A rare case of progressive cardiac conduction disorder presenting to the emergency department. | journal=Am J Emerg Med | year= 2019 | volume= 37 | issue= 5 | pages= 1006.e1-1006.e4 | pmid=30723001 | doi=10.1016/j.ajem.2019.01.054 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=30723001 }} </ref> | [[Stokes-Adams attack]]s can be precipitated by this condition. These involve a temporary loss of consciousness due to [[ventricular fibrillation]] or [[asystole]].<ref name="pmid30723001">{{cite journal| author=Carius BM, Long B, Schauer S| title=Lev's Syndrome: A rare case of progressive cardiac conduction disorder presenting to the emergency department. | journal=Am J Emerg Med | year= 2019 | volume= 37 | issue= 5 | pages= 1006.e1-1006.e4 | pmid=30723001 | doi=10.1016/j.ajem.2019.01.054 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=30723001 }} </ref> | ||
===Pathophysiology of AV Block=== | ===Pathophysiology of AV Block=== | ||
Idiopathic — Apparently idiopathic progressive cardiac conduction defects are the most common cause of AV block, occurring in approximately 50 percent of cases. Idiopathic AV conduction abnormalities are characterized by progressive impairment of the conduction system which occurs gradually over decades: | * Fibrosis and sclerosis of the conduction system, which appears idiopathic, accounts for about one-half of cases of AV block. | ||
* Conduction system fibrosis and sclerosis may be induced by several different conditions that often cannot be distinguished clinically. | |||
* Additionally, some degree of fibrosis and sclerosis occurs as part of the normal aging process, with the prevalence increasing progressively with age with approximately a 2:1 male:female predominance. | |||
* Among a prospective cohort of more than half a million United Kingdom residents, the prevalence of conduction system disease (which included all levels of AV block, as well as bundle branch blocks) was approximately 11 per 10,000 persons under age 55 and increased to between 55 per 10,000 persons ≥65 years of age [2]. | |||
* Idiopathic — Apparently idiopathic progressive cardiac conduction defects are the most common cause of AV block, occurring in approximately 50 percent of cases. Idiopathic AV conduction abnormalities are characterized by progressive impairment of the conduction system which occurs gradually over decades: | |||
●Lenegre's disease – The term Lenegre's disease has been traditionally used to describe a progressive, fibrotic, sclerodegenerative affliction of the conduction system in younger (age <60 years) individuals. Lenegre's disease is frequently associated with slow progression to complete heart block and may be hereditary. (See 'Familial disease' below.) | ●Lenegre's disease – The term Lenegre's disease has been traditionally used to describe a progressive, fibrotic, sclerodegenerative affliction of the conduction system in younger (age <60 years) individuals. Lenegre's disease is frequently associated with slow progression to complete heart block and may be hereditary. (See 'Familial disease' below.) | ||
●Lev's disease – The term Lev's disease has been used to refer to "sclerosis of the left side of the cardiac skeleton" in older patients (age >70 years old), such as that associated with calcific involvement of the aortic and mitral rings | ●Lev's disease – The term Lev's disease has been used to refer to "sclerosis of the left side of the cardiac skeleton" in older patients (age >70 years old), such as that associated with calcific involvement of the aortic and mitral rings. Lev's disease is caused by fibrosis or calcification extending from any of the fibrous structures adjacent to the conduction system into the conduction system. | ||
Depending upon the anatomic location of the areas of fibrosis and sclerosis, various conduction abnormalities can result | Depending upon the anatomic location of the areas of fibrosis and sclerosis, various conduction abnormalities can result with the following causing Lev's disease: | ||
●Involvement of the mitral ring or the central fibrous body, for example, may be the most common cause of complete heart block with a narrow QRS complex in the elderly. | ●Involvement of the mitral ring or the central fibrous body, for example, may be the most common cause of complete heart block with a narrow QRS complex in the elderly. | ||
==Related Chapters== | ==Related Chapters== | ||
Revision as of 22:09, 28 April 2020
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Sara Mohsin, M.D.[2]
Synonyms and keywords: Lenègre-Lev disease, Lenègre’s disease, Maladie de Lenègre, Acquired complete heart block
Overview
Lev's disease is an acquired complete heart block due to idiopathic fibrosis and calcification of the electrical conduction system of the heart. Lev's disease is most commonly seen in the elderly, and is often described as senile degeneration of the conduction system.
One form has been associated with SCN5A.[1]
Historical Perspective
- In 1954, Lenègre published the condition in French, hence, it is also referred to as Lenègre’s disease or Maladie de Lenègre in French, after his name.[2]
- In 1964, it was described independently by the two researchers, Jean Lenègre and Maurice Lev in English, but the condition is generally called after Lev.[3][4][5][6]
Pathophysiology
- Fibrous transformation progressive and slow, of degenerative origin, of the two branches of the bundle of His, resulting in progressive conductional disorders:[7][8][9][10][11][12]
- block of branch with or without hemibloc of the opposite side
- then complete, paroxysmal then permanent block of auriculoventricular (disease of Adams-Stokes).
Associated Conditions
Stokes-Adams attacks can be precipitated by this condition. These involve a temporary loss of consciousness due to ventricular fibrillation or asystole.[13]
Pathophysiology of AV Block
- Fibrosis and sclerosis of the conduction system, which appears idiopathic, accounts for about one-half of cases of AV block.
- Conduction system fibrosis and sclerosis may be induced by several different conditions that often cannot be distinguished clinically.
- Additionally, some degree of fibrosis and sclerosis occurs as part of the normal aging process, with the prevalence increasing progressively with age with approximately a 2:1 male:female predominance.
- Among a prospective cohort of more than half a million United Kingdom residents, the prevalence of conduction system disease (which included all levels of AV block, as well as bundle branch blocks) was approximately 11 per 10,000 persons under age 55 and increased to between 55 per 10,000 persons ≥65 years of age [2].
- Idiopathic — Apparently idiopathic progressive cardiac conduction defects are the most common cause of AV block, occurring in approximately 50 percent of cases. Idiopathic AV conduction abnormalities are characterized by progressive impairment of the conduction system which occurs gradually over decades:
●Lenegre's disease – The term Lenegre's disease has been traditionally used to describe a progressive, fibrotic, sclerodegenerative affliction of the conduction system in younger (age <60 years) individuals. Lenegre's disease is frequently associated with slow progression to complete heart block and may be hereditary. (See 'Familial disease' below.)
●Lev's disease – The term Lev's disease has been used to refer to "sclerosis of the left side of the cardiac skeleton" in older patients (age >70 years old), such as that associated with calcific involvement of the aortic and mitral rings. Lev's disease is caused by fibrosis or calcification extending from any of the fibrous structures adjacent to the conduction system into the conduction system.
Depending upon the anatomic location of the areas of fibrosis and sclerosis, various conduction abnormalities can result with the following causing Lev's disease:
●Involvement of the mitral ring or the central fibrous body, for example, may be the most common cause of complete heart block with a narrow QRS complex in the elderly.
Related Chapters
References
- ↑ Schott JJ, Alshinawi C, Kyndt F; et al. (1999). "Cardiac conduction defects associate with mutations in SCN5A". Nat. Genet. 23 (1): 20–1. doi:10.1038/12618. PMID 10471492.
- ↑ LENEGRE J (1964). "ETIOLOGY AND PATHOLOGY OF BILATERAL BUNDLE BRANCH BLOCK IN RELATION TO COMPLETE HEART BLOCK". Prog Cardiovasc Dis. 6: 409–44. doi:10.1016/s0033-0620(64)80001-3. PMID 14153648.
- ↑ Lev M. Anatomic basis for atrioventricular block. Am J Med 1964;37:742-8. PMID 14237429.
- ↑ Lenegre J. Etiology and pathology of bilateral bundle branch block in relation to complete heart block. Prog Cardiovasc Dis 1964;6:409-444. PMID 14153648.
- ↑ LEV M (1964). "ANATOMIC BASIS FOR ATRIOVENTRICULAR BLOCK". Am J Med. 37: 742–8. doi:10.1016/0002-9343(64)90022-1. PMID 14237429.
- ↑ https://annals.org/aim/article-abstract/696353/lev-len-gre-diseases
- ↑ https://litfl.com/lenegre-lev-disease/
- ↑ https://academic.oup.com/europace/article/7/2/122/557245
- ↑ Mueller, Richard L.; Bergman, Geoffrey (1995). "Calcific Aortic Stenosis and Associated Lev's Disease". Circulation. 92 (10): 3138–3138. doi:10.1161/01.CIR.92.10.3138. ISSN 0009-7322.
- ↑ Royer, Anne; van Veen, Toon A.B.; Le Bouter, Sabrina; Marionneau, Céline; Griol-Charhbili, Violaine; Léoni, Anne-Laure; Steenman, Marja; van Rijen, Harold V.M.; Demolombe, Sophie; Goddard, Catharine A.; Richer, Christine; Escoubet, Brigitte; Jarry-Guichard, Thérèse; Colledge, William H.; Gros, Daniel; de Bakker, Jacques M.T.; Grace, Andrew A.; Escande, Denis; Charpentier, Flavien (2005). "Mouse Model of
SCN5A
-Linked Hereditary Lenègre's Disease". Circulation. 111 (14): 1738–1746. doi:10.1161/01.CIR.0000160853.19867.61. ISSN 0009-7322. line feed character in
|title=at position 15 (help) - ↑ Okada R (1996). "[Lev's disease]". Ryoikibetsu Shokogun Shirizu (15): 515–8. PMID 9048083.
- ↑ Suzuki H, Kawai S (1996). "[Lenegre's disease]". Ryoikibetsu Shokogun Shirizu (15): 512–4. PMID 9048082.
- ↑ Carius BM, Long B, Schauer S (2019). "Lev's Syndrome: A rare case of progressive cardiac conduction disorder presenting to the emergency department". Am J Emerg Med. 37 (5): 1006.e1–1006.e4. doi:10.1016/j.ajem.2019.01.054. PMID 30723001.